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Exposure to oxygen in the air and to dirt and oils from contact with skin.
US cents have been made of copper-plated zinc since 1982, and before that most of them were bronze containing 95% copper. In either case the copper combines with O2 to cause discoloration. If undisturbed the coins can develop a greenish patina like the Statue of Liberty, which is made of copper. In general pennies are used enough that the patina can't develop but they still darken in color.
What else can I help you with?
Does isopropyl alcohol have the potential to discolor fabric?
Yes, isopropyl alcohol has the potential to discolor fabric.
What happens to pennies in vinegar?
The acetic acid removes the oxide on the metal, brightening it. The process is used, in a much more sophisticated and controlled manner to clean metal industrially, prior to plating etc; and is actually called "pickling"!
If you had 3.5 x 10-16 moles of pennies how many would you have?
1 mole is 6.022*1023 atoms, avagradro's number. 1 mole of pennies is equal to 6.022*1023 pennies. 3.5*10-16 mol pennies * 6.022*1023 pennies/1 mol pennies = 210,770,000 pennies If you had 3.5*10-16 moles of pennies, you would have 2.1077*108 pennies.
How many pennies would you get for 2 nickels?
You would get 10 pennies for 2 nickels, as each nickel is worth 5 pennies.
Are pennies flammable?
Yes, pennies are flammable due to their copper content. When exposed to high heat, pennies can ignite and burn. However, it is important to note that intentionally burning pennies is unsafe and can release harmful fumes.
How do sediments affects organisms in water?
sediment causes H2O to discolor. also sediment causes some submerged vegetation to die.
When was Timandromorpha discolor created?
Timandromorpha discolor was created in 1896.
When was Nepeta discolor created?
Nepeta discolor was created in 1833.
When was Suillia discolor created?
Suillia discolor was created in 1927.
When was Conocephalus discolor created?
Conocephalus discolor was created in 1837.
What is a sentence for discolor?
actually, its how do you use discolor in a sentence but i will answer it anyway. his skin was discolored (I DONT KNOW!)
Can H2S gas discolor carpeting?
H2S do not have bleaching properties.So it do not discolor
What causes kool-aid to discolor a nail?
Well I think it has someting to do with tests and math ( DANG IT WHY DOES EVERYTHING HAVE TO DO WITH MATH!!??!!??) Or somthing like that.
What causes finger nails to discolor?
Healthy fingernails come from a healthy diet and exercise. If they are discolored they may have fungus or bacteria causing the change in color.
Does isopropyl alcohol have the potential to discolor fabric?
Yes, isopropyl alcohol has the potential to discolor fabric.
What is the scientific name for American pussywillow?
The scientific name for American pussywillow is Salix discolor.
Can it discolor the tongue?
yes.
